SU363055A1 - ALL-UNION 5 P.ug G'LT •; .. • '. • -. г vf ^ T ^^ if. ^ г 'i; Л i.,! t I 17 J, i L, ^.' "4 -1, -. i 'rS.'. • - Google Patents

Description

The invention relates to a measurement technique and can be used to measure the magnetic fields of solenoids, permanent magnets, and pulsed magnetic fields of communication equipment devices.

At present, the measurement of magnetic quantities is carried out using instruments whose principle of action is based on the phenomenon of electromagnetic induction. Such devices include induction teslamers with rotating or spinning oscillation coils, as well as devices whose principle of action is based on the interaction of the measured field with the current frame.

However, such devices are characterized by the presence of sliding contacts or a source of compressed air, the dependence of the readings on the external mechanical influences, and the measurement of the characteristics of only constant magnetic fields.

The proposed device does not have these disadvantages and differs from those known in that it uses a magnetic contact connected to a high-voltage stabilized current source as a sensitive element, and a voltage meter is connected parallel to the magnetic-controlled contact.

When moving a magnetically controlled contact into space with a certain field strength under the action of magnetic interaction forces, the distance between the electrodes will change, which, in turn, will lead to a sharp change in voltage drop on the corona, which with a high degree of accuracy measured with electrical measuring instruments. In this case, the higher the magnetic field intensity, the greater the interaction force between the electrodes, the smaller the distance between them, and the smaller the magnitude of the voltage drop measured between the electrodes.

The drawing is a diagram of the proposed device.

The device contains a magnetically controlled contact 1, electrodes 2 t of a magnetically soft material, a glass cylinder 3 filled with nitrogen, a voltage drop meter 4 (voltmeter, oscilloscope), microammeter i, stabilized high voltage current source 6, limiting resistance 7, switch (toggle switch) 8. 9 - the magnetic line, and - the distance between the springs.

The device works as follows.

When the toggle switch S is turned on in the circuit, a current of the order of tenths of a milliampere from the high-voltage stabilized source 6 is established and maintained. Under the influence of the measured magnetic field, the distance by electrodes and changes.

on time, therefore, the voltage drop across the bottom interval.

The voltage drop across the discharge gap is measured using a meter 4 (voltmeter or oscilloscope), and its scale can be calibrated directly to the measured magnetic field values or a conversion table for this type of magnetically controlled contact is made.

The sensitivity of the device is one or even tens of volts per oersted.

Subject of the invention A device for measuring magnetic quantities, comprising a stabilized high-voltage current source, a sensitive element, a voltage meter, characterized in that, in order to extend the possibility of measuring both constant and alternating magnetic quantities, increasing the reliability of the measuring system as a sensitive element used magnetic contact, connected to a stabilized high-voltage current source, and parallel to the magnetic contact is connected and strain gauge.

/

 h